prompt='\nHow old are you ?'
prompt+='\n(Output your age)'

age=None
while True:
    age=int(input(prompt))
    if age<3:
        print("The fare is 3 $")
        break
    elif age<12:
        print("The fare is 10$")
        break
    else:
        print(("The fare is 15$"))
        break
